First off, I'm not totally sure why access to the canisters of SCP-XXXX is punishable by termination, especially when nobody not authorized to know their locations knows where the canisters are.

Second, I want to know more about seeing "The End of Evangelion". Do affected persons actually perceive themselves as living out the experience? What about somebody who's never seen the movie? How do they interact with the world? Do they just experience the entirety of the movie in 3 minutes, like being in a dream? There's very little here beyond some neurological disorders and the name "End of Evangelion".

Third, why dangle "The Kyoto Incident" in front of the reader but then say that access to the log is unavailable? That just frustrates the reader because there's nothing else in the article about incidents involving the SCP. Mentioning "The Kyoto Incident" simply acts to slightly pad the length of a small article.

The article is super small and does nothing for me. This is frustrating because I believe that this is a genuinely interesting idea that isn't given enough room to breathe or shine.

I will defend the termination policy. It is still a weapon, and I'm not sure what other punishment is suitable for attempted theft. I can't find any guidelines for punishments, so I went with the one that first came to mind. If you can offer a better option, I will gladly use it.

Other then that, I see what you're saying, and I will refine the article. Now that I see people like it, I'm going to give it my all to get it working.

Although the containers are fine, I was just wondering what 'at various locations' means. Or actually, where? In a storage area, a containment cell, where do you store them?

Records of each sample and where they are stored are on file with [REDACTED].

You shouldn't redact stuff in the containment procedures. Because, if this were a real document for the SCP, staff reading it don't know which file it is they can find all the locations at! You don't have to actually make the file, but think of a name to place there.

Unauthorized access to samples of SCP-XXXX is punishable with termination.

Kind of sounds standard to me for the Foundation. So wouldn't place it in the file, but that's my opinion.

SCP-XXXX is a neurological weapon. It is naturally gaseous

I think it would be better if you start with the 'SCP-XXXX is naturally gaseous' stuff.

Also, in the description you use the word approximately a lot. It's not bad, but a little bit distracting.

sensation is restored

I would personally change this to 'regains consciousness'

Throughout the duration of the film

So, do they watch the entire film? Which means the symptoms go on for 87 minutes!? And yet nobody has died, how does that work?

Access to Incident Log-XXXX-01 has been restricted indefinitely. Attempts to access it will be denied, regardless of security clearance. -O5-█

Why is the access denied? The SCP isn't that dangerous, I mean it doesn't kill anyone. So why would access to this file be denied, by the O5 no less! That means that there's something very important about this SCP, even the 05 has to deny acces! How does that work with the information just given about the SCP?

All in all, it's a good concept which needs some sharp edges removed and some info added to make it work. Making the containment procedures and the description more elaborate would be nice. That way you can give this interesting SCP more story to tell! Good luck on editing! :)